Intraparietal sulcus

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Brain: Intraparietal sulcus
Lateral surface of left cerebral hemisphere, viewed from the side. (Intraparietal sulcus visible at upper right, running horizontally.)
Principal fissures and lobes of the cerebrum viewed laterally. (Fissures not labeled, but parietal lobe is colored yellow.)
Latin	sulcus intraparietalis
Gray's	subject #189 822
Acronym(s)	itps
NeuroNames	hier-79
Dorlands/Elsevier	12768887/s_28

The lateral surface of the parietal lobe is cleft by a well-marked furrow, the intraparietal sulcus (IPS) of Turner, which consists of an oblique and a horizontal portion.

The IPS is involved in processing symbolic numerical information. A 2006 study by Jessica Cantlon et. al. concluded The IPS provides the neurobiological platform for nonsymbolic numerical processing in young children, then supports the expanding capacity for higher-math operations in adulthood.^[1]

The IPS is also involved in processing the Interprets the intent of others. A 2006 study by Scott Grafton and Antonia Hamilton has found that the IPS was strongly activated when the subject saw another person reach for an object that they want, like a cookie. "We were able to find the part of the brain involved in interpreting the goal of another person, even if no words are spoken," says Hamilton. ^[2]

[edit] References

1. ^ Cantlon J, Brannon E, Carter E, Pelphrey K (2006). "Functional imaging of numerical processing in adults and 4-y-old children.". PLoS Biol 4 (5): e125. PMID 16594732. link
2. ^ Grafton, Hamilton (2006). "Dartmouth Study Finds How The Brain Interprets The Intent Of Others.". Science Daily. [ http://www.sciencedaily.com/releases/2006/02/060216191651.htm link]

[edit] External links

• Illustrations at ssc.uwo.ca
• Dictionary at eMedicine intraparietal+sulcus

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

Telencephalon (cerebrum, cerebral cortex, cerebral hemispheres) - edit

primary sulci/fissures: medial longitudinal, lateral, central, parietoöccipital, calcarine, cingulate frontal lobe: precentral gyrus (primary motor cortex, 4), precentral sulcus, superior frontal gyrus (6, 8), middle frontal gyrus (46), inferior frontal gyrus (Broca's area, 44-pars opercularis, 45-pars triangularis), prefrontal cortex (orbitofrontal cortex, 9, 10, 11, 12, 47) parietal lobe: postcentral sulcus, postcentral gyrus (1, 2, 3, 43), superior parietal lobule (5), inferior parietal lobule (39-angular gyrus, 40), precuneus (7), intraparietal sulcus occipital lobe: primary visual cortex (17), cuneus, lingual gyrus, 18, 19 (18 and 19 span whole lobe) temporal lobe: transverse temporal gyrus (41-42-primary auditory cortex), superior temporal gyrus (38, 22-Wernicke's area), middle temporal gyrus (21), inferior temporal gyrus (20), fusiform gyrus (36, 37) limbic lobe/fornicate gyrus: cingulate cortex/cingulate gyrus, anterior cingulate (24, 32, 33), posterior cingulate (23, 31), isthmus (26, 29, 30), parahippocampal gyrus (piriform cortex, 25, 27, 35), entorhinal cortex (28, 34) subcortical/insular cortex: rhinencephalon, olfactory bulb, corpus callosum, lateral ventricles, septum pellucidum, ependyma, internal capsule, corona radiata, external capsule hippocampal formation: dentate gyrus, hippocampus, subiculum basal ganglia: striatum (caudate nucleus, putamen), lentiform nucleus (putamen, globus pallidus), claustrum, extreme capsule, amygdala, nucleus accumbens Some categorizations are approximations, and some Brodmann areas span gyri.